hey, i've been on this site for a while doing many researchs trying to pick the right duramax. I bought one last week after 2 years of waiting for a dmax of my own. The truck is all stock its rolling on a set of 325's and its alrite on mpg. I'm looking for something to increase my mpg. I looked up on the Kennedy boost stick and the PPE boost stick, what's the difference between them (disregarding the huge price difference) and which is better? I also need to find the right programmer to calibrate my speedo since it is 9mph off and the dealer said they cant recalibrate it cuz of the tires ( bunch of dumbasses). I would like to increase the power to move those huge tires and also not sacrifice mpgs. any suggestions would be helpful from your experiences.
